Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc663cf6d15a566…

MALICIOUS

PDF

75.5 KB Created: 2021-09-17 14:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1bcba103985a83d281aeafd3a2b912d4 SHA-1: 3393a3f92ffa2c581233fbbb9be6e332411805fb SHA-256: ffc663cf6d15a566ad653a79a1eb42ef43e297df4c0b783f9a5bb3410505fe98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file's structure and URL patterns suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=lucky+patcher+zombie+catchers PDF link annotation
    • https://vcvscr.cz/www/www/fckphotos/file/wujixekopejowebot.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ced93cab0f---93186631531.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/napidus.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/kezilami.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///43128845193.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sotukefasalovumigu.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/rowiwodedi.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/sulosalunukazap.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/webuxilenexedibogi.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/40612395654.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/66031656299.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/risalolujotafugolemu.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/14971445121.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/b1d69a5ca4faa773e10ba68c405e2135/sanozevagebewaj.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/wozitakenovuzog.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/pujuzudifamovem.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/juleket.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/bilewajezakiwede.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/55616508858.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3jrubb4edskasveept68h7p0o6/zokevika.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a90668721ebe80965162d90e71f0d66d/47556645093.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/65694963633.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/tolami.pdfIn PDF document text
    • http://bptramptour.pl/files/file/366504311.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 17840 bytes
SHA-256: 3d4241ed3d2faa1835eac2400a492637f7a38022d7bd3c340785b6a9cb833584
font_01_sfnt_off00011567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1